47278071 has 12 divisors (see below), whose sum is σ = 72307872. Its totient is φ = 29664576.

The previous prime is 47278009. The next prime is 47278093. The reversal of 47278071 is 17087274.

It is not a de Polignac number, because 47278071 - 2¹³ = 47269879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47278001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154351 + ... + 154656.

It is an arithmetic number, because the mean of its divisors is an integer number (6025656).

Almost surely, 2^47278071 is an apocalyptic number.

47278071 is a deficient number, since it is larger than the sum of its proper divisors (25029801).

47278071 is a wasteful number, since it uses less digits than its factorization.

47278071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309030 (or 309027 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 36.

The square root of 47278071 is about 6875.9051040572. The cubic root of 47278071 is about 361.5929181554.

The spelling of 47278071 in words is "forty-seven million, two hundred seventy-eight thousand, seventy-one".